package com.dp.utils;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class LoginInterceptor implements HandlerInterceptor {


    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
       //判断是否需要拦截，ThreadLocal中是否有用户
        if(UserHolder.getUser()==null){

            //不存在拦截
            response.setStatus(401);
            return  false;
        }
        //有用户则放行
        return true;
    }
}
